The Hantavirus Surface Glycoprotein Lattice and Its Fusion Control Mechanism.

The Hantavirus Surface Glycoprotein Lattice and Its Fusion Control Mechanism.
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DOI:
10.1016/j.cell.2020.08.023
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发表时间:
2020-10-15
期刊:
影响因子:
64.5
通讯作者:
Guardado-Calvo P
Guardado-Calvo P
中科院分区:
生物学1区
文献类型:
--
作者:
Serris A;Stass R;Bignon EA;Muena NA;Manuguerra JC;Jangra RK;Li S;Chandran K;Tischler ND;Huiskonen JT;Rey FA;Guardado-Calvo P

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Hantaviruses are rodent-borne viruses causing serious zoonotic outbreaks worldwide for which no treatment is available. Hantavirus particles are pleomorphic and display a characteristic square surface lattice. The envelope glycoproteins Gn and Gc form heterodimers that further assemble into tetrameric spikes, the lattice building blocks. The glycoproteins, which are the sole targets of neutralizing antibodies, drive virus entry via receptor-mediated endocytosis and endosomal membrane fusion. Here we describe the high-resolution X-ray structures of the heterodimer of Gc and the Gn head and of the homotetrameric Gn base. Docking them into an 11.4-Å-resolution cryoelectron tomography map of the hantavirus surface accounted for the complete extramembrane portion of the viral glycoprotein shell and allowed a detailed description of the surface organization of these pleomorphic virions. Our results, which further revealed a built-in mechanism controlling Gc membrane insertion for fusion, pave the way for immunogen design to protect against pathogenic hantaviruses. X-ray structures of the hantavirus surface glycoprotein lattice reveal a built-in mechanism controlling envelope glycoprotein membrane insertion and provide important information for development of immunogen protection against these deadly viruses.
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